1. Well, it is not because those tools (body size and activity) do not exist at this time that they should not. I am taking the same amount of calcium than a man who is 6'2" and weighs 330 lbs - that does not seem logical to me -
2. I presently do not have a doctor - more than 10,00 people in Ontario are in the same situation - so should you not be aware of that - we have to find our own way in the maze of websites - good and bad information - so if your organization would help a little more it would be appreciated. Thank you.

Look up the calcium calculator. It helps you find how much is taken in by diet and how much you need for your age. Your doctor should help you with this. I have never seen a comparison to body size or activity. Being active will help keep bones strong for sure.